title: Coherent beam combining of two femtosecond fiber chirped-pulse amplifiers.
abstract: We demonstrate coherent beam combining of two femtosecond fiber chirped-pulse amplifiers seeded by a common oscillator. Using a feedback loop based on an electro-optic phase modulator, an average power of 7.2 W before compression is obtained with a combining efficiency of 90%. The spatial and temporal qualities of the oscillator are retained, with a recombined pulse width of 325 fs. This experiment opens up a way to scale the peak/average power of ultrafast fiber sources.
authors.affiliation: Laboratoire Charles Fabry de l'Institut d'Optique, UMR 8501 CNRS, Université Paris Sud, Palaiseau, France. louis.daniault@institutoptique.fr
authors.forename: L
authors.initials: L
authors.lastname: Daniault
authors.forename: M
authors.initials: M
authors.lastname: Hanna
authors.forename: L
authors.initials: L
authors.lastname: Lombard
authors.forename: Y
authors.initials: Y
authors.lastname: Zaouter
authors.forename: E
authors.initials: E
authors.lastname: Mottay
authors.forename: D
authors.initials: D
authors.lastname: Goular
authors.forename: P
authors.initials: P
authors.lastname: Bourdon
authors.forename: F
authors.initials: F
authors.lastname: Druon
authors.forename: P
authors.initials: P
authors.lastname: Georges